The 1981 has a TE-A. The '83/4 has an unmarked pick-up which may not be the original ... which is my condrum.
The unmarked pick-up needs, I think, to be rewound (it's very faint). If it's not the original then there's no point in doing this. However, I bought the guitar off a near non-player who I know had had owned it for many years, and it seems to be in it's complete original state. If the neck pick-up was replaced, it was done many years ago.
So, I thought I'd look for a replacement .....